<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <title>OpenCV.js - Image Contouring</title>
</head>
<script src="https://docs.opencv.org/4.x/opencv.js"></script>
<body>
  <img src="./a.jpeg" height="300" id="img"/>
    <canvas id="myCanvas" width="800" height="600"></canvas>
    <script src="./script.js"></script>
</body>

</html>